I am trying to find an expression which would meet my needs. In the report that I am currently writing I would like to explain that I have done a certain action in order to "put more weight/power" into a conclusion.

There is an expression for this purpose in the French language (mettre du poids dans), and I know that translating an expression from a language to another nearly never works. I tried to find the solution by asking Google but I guess I am not using the correct keywords... Does anyone would have any ideas?

[EDIT]

I am actually trying to say that my action will carry more weight (thanks Rant) but I do not know how I should formulate it. I have started my sentence like this:

The investigation will also draw a timeline of activities in order to add expression to the previous arguments.

I have moved from conclusion to argument as it make more sense in the current context. How can I add an expression which means carry more weight?

You can certainly do something to add weight to an argument in English. It would seem a little odd to add weight to a conclusion in any language because a conclusion can’t do any more than, well, conclude. It’s difficult to advise further without knowing the broader context.

Thanks for the input! I think the synonyms are better for me. I do not remember reading any technical papers with substantiate in it. Moreover, as my English is quite poor, it would look out of place in my report :)
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FlanflDec 4 '11 at 16:56